Process for making turing and the product so produced



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PROCESS FOR EAKING TUBING AND THE FRODUGT S0 PRODUCED Filed Oct. 27, 1937 INVEN TORS R/cH/a/w WEINGA/VD uslu m mu mu HER? Elias- W:

- tub Eu m uucu, K021i c22- h rby coating; impregmating c strip of mpcr c2 suitable m with an album mucc, c. g ggcicliue in will-- 10 and 7 4 .11 ing the oi has been 6085M with U12 Ellb 2mm 1:;

The reason for this lies in the fact we;

formed by two layers gclutme la a that Xormed betw mum cl acme.

'Ihe general object-of the iuveutlcu is to pmvide a coil pcper tubing having Email; that is stroly resistant, lac twrlng on 21ml.

It is a c object of the invcuu in maruptum dur' all us a sale 21 by he; a seam whim will mi. w

-a wry la oi the 0mm in c $388 invention ucccr :11. mm steps and rcluticu c1? em or of cuch 50 with rust, to euch oil the cmerc, and

we article i the iwtumc, cm '1' me relation ci elcmculu, which are cxmmcilflcd in we fciicg dc m: w lcsme, and clue me 02 e invention will ha in mu in ma cl. r a me compleie of this I and object-c 0i tiuc in mm, reicreuce ice had to m in mum-.4 mgmccuiuu 0f $3 1 is El, will" mu mum 2c, 19%

an m icr w one cm: 1 went (if the pram of the imam.

2 is a. pecticu of tlic article of the luv Fig; 3 fig & 0i Flu. 3.

For the fibrous cheat mm them may bu eulcycu u cuitulrle flamed preicmuly cf mug vegetable am suclu- 3c: smmulc, as c formed of mm. mi==m kcdzu and w gumpl plants and the c pupal: shccl: is preferably one in the fllu'ec are non-- criented such. for pic, as; a sheet formed on a per mace of the cylinder-sieve type, The thickucss of the 4 may be vu in acccnlw mace with the m oi ails-1 4 huving rcgui'd in: the alumna prcscurcc employed in cauuaue mauuiactui'c and the whiz of the sausage meat. Preferably a t oi the Yno 0i Jumm a is clawed, a, 1. w having a weight of uncut c0 gr per square meter being suitable.

It lms now can found um it makes a. difference what kind of adhesive is used to farm the seam of the pane? tubing priorto coating or 1 meg with the Li =forming material. If one uses, for example, usual paper pastes. such as starch Qli gum umblc. such pastes will dissulve, partly or aitcgetllcx', when the paper tubing is treated with fllm-2ormii1g mute rial-in solution, liecs, gushes OK this type are 30 extremely water-soluble and, water-swelling. This "Q1 dvanmge is purticrly apparent when aqueous solutions of hi temperature are used for coating the tubing. 3 cuity can bc successfully obviated if the edges (lithe paper sheet are united with an udhcsive which is uouswelling and insclle in water and unafiecicd by the temperatures wed in the pmccss of fabricalling the tubing or in curing and making sunfiagc; A suitable salve is a. hydrophobic 003- 40 loidul substance such as a, nuturalor synthelic main, 2, wuterdlubie ceiluiosc ester, ceilulcse ether, or ma clhzlous substance such as ge1aline which has illSOlfliF/Zd and rendered non-swelling by a suitable hardening agent such as formaldehyde, 5. cmutc or theme.

For coal and/or impregnating the paper tubing there is employed a suitable hyclmpiillie crguuic filming subcmuce capable of being tramsiormed into a uydrolic wbsiance which is lnaoiuble in water. but which swells therein and is lion-fusible at the uempemturw used in the clicking and curing oil saucagesv Suitable film-lo substances are the water-swelling collulda such us geiutiuc, cucem and alkali-suitable or water-zombie cellulose ethcxu uuch, for exumpic, cu an 0337-- m hydrcm ulkyl ceiiuiczac ether, cellulose 11M which may be z-egcuch ctczi from viccusc 0r precipitated from soiutlcus of ccllulcse in iuccmic cults, manic or or, 69

mi cu s cmlccalimcut u; a View or? am cuticle ill a short time at an elevated temperature, the gelatine coating hardened on the outside only by passing the tubing through a solution comprising:

Grs.

Formaldehyde 40 Glycerine 100 Water 860 and finally dried at an elevated temperature while inflated.

The finished casing has to a high degree the desirable properties of natural gut, in strength, elasticity, flexibility, pliability and porosity, and like natural animal membranes, possesses the unique property of high expansion in the moistened condition and contraction when dried. It has also been found to satisfactorily meet the exacting requirements of casings when smoking, curing and boiling processes are involved.

The product of this invention, therefore, is especially practicable for use in a tubular or other shaped container for foods intended 101' human consumption, although it is to be understood that it may be used for receiving and preserving substances of a non-edible nature, or, in fact, wherever and whenever a container or casing with the properties of natural casing is required.

We claim:

i. In a process for making artificial sausage casings, the steps comprising forming a sheet of fibrous material into a tubing, forming a seam therein by uniting the overlapping edges of the sheet with a water-insoluble, non-swelling adhesive applied directly to the fibrous material and thereafter passing the tubing through a solution of a water-swelling, film-forming material with the interior and exterior surfaces of the tubing in contact with the solution and 1 1: the tubing as it passes out oi said solution.

2. In a process for making artificial sausage casings, the steps comprising continuously form ing a sheet of paper into a tubing ha the longitudinal edges overlapping, g said overlapping edges with a gelatine adhesive, insolubilizing the gelatine adhesive in the'seani,'ing the tubing so formed through a solution of gels-- tine with the interior and exterior surfaces or the tubing in contact with the gelatine, withdrawing the tubing from the solution in a vertical direction while inflating the tubing, thereafter insoiubillzing the gelatirie coating on the exterior and drying the coated tubing.

in a icr artificial sausage casings, the steps comprising treating tubing formed or a paper sheet having a seam formed with a hydrophobic colloidal adhesive with a solution of a hydrophilic film-forming material on the interior and exterior surfaces and withdrawing the tubing from said solution in a vertical direction while inflating the tubing, the rate of withdrawal being correlated with the viscosity of the solution so as to give a uniform coating of the desired thickness.

4. As an article of manufacture, an artificial sausage casing comprising a'tubing iormed of a sheet of paper having a longitudinal seam therein formed with a hydrophobic colloidal adhesive and coated on the interior and exterior with a hydrophilic film-forming material.

5. As an article of manufacture, an i'irtificial sausage casing comprising a tubing formed of a sheet of fibrous material having a seam formed with an insolubilized gel'atinc adhesive, the tub ing being coated on the interior and exterior with a film of gelatlne which has been partially insolubilized substantially on the exterior of the tubing.v

6, A process for making artificial sausage casing comprising forming a sheet of fibrous material into a tubing with longitudinal edges of the sheet overlapping, sealing the overlapping edges to-.

gether with a water-insoluble adhesive, coating the interior and exterior surfaces of the tubing with a water-swelling, film-forming material, and treating the exterior coating with a hard ening agent.

7. A process for making artificial sausage casing comprising forming a sheet of fibrous material into a tubing with longitudinal edges of the sheet overlapping, sealing the overlapping edges together with a water-insoluble adhesive, coating the interior and exterior surfaces of the tubing with a water soluble, film-forming material, and treating the exterior coating with a solution taming a substance to render the coating insoluble in water and another substance to render the coating soft and flexible.

8. An artificial sausage casing comprising a tubing formed of a sheet or fibrous material having the edges of the sheet overlapping to form a seam, an insolubllized gelatihe adhesive sealing the overlapping edges together, n, cos. of s'oit gelatine on the interior of the tubing, and a coating of a hardened, water-insoluble gelatine on the exterior of the tubing.

is WEIWQAEEH 

